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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package jdk.vm.ci.hotspot;

import java.util.List;
import java.util.Set;

import jdk.vm.ci.code.CompilationRequest;
import jdk.vm.ci.common.JVMCIError;
import jdk.vm.ci.common.NativeImageReinitialize;
import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option;
import jdk.vm.ci.runtime.JVMCICompiler;
import jdk.vm.ci.runtime.JVMCICompilerFactory;
import jdk.vm.ci.runtime.JVMCIRuntime;
import jdk.vm.ci.services.JVMCIPermission;
import jdk.vm.ci.services.JVMCIServiceLocator;

import static jdk.vm.ci.services.Services.IS_IN_NATIVE_IMAGE;

final class HotSpotJVMCICompilerConfig {

    
This factory allows JVMCI initialization to succeed but raises an error if the VM asks JVMCI to perform a compilation. This allows the reflective parts of the JVMCI API to be used without requiring a compiler implementation to be available.
/** * This factory allows JVMCI initialization to succeed but raises an error if the VM asks JVMCI * to perform a compilation. This allows the reflective parts of the JVMCI API to be used * without requiring a compiler implementation to be available. */
private static class DummyCompilerFactory implements JVMCICompilerFactory, JVMCICompiler { private final String reason; DummyCompilerFactory(String reason) { this.reason = reason; } @Override public HotSpotCompilationRequestResult compileMethod(CompilationRequest request) { throw new JVMCIError("no JVMCI compiler selected: " + reason); } @Override public String getCompilerName() { return "null"; } @Override public JVMCICompiler createCompiler(JVMCIRuntime runtime) { return this; } }
Factory of the selected system compiler.
/** * Factory of the selected system compiler. */
@NativeImageReinitialize private static JVMCICompilerFactory compilerFactory;
Gets the selected system compiler factory.
Throws:
Returns:the selected system compiler factory
/** * Gets the selected system compiler factory. * * @return the selected system compiler factory * @throws SecurityException if a security manager is present and it denies * {@link JVMCIPermission} for any {@link JVMCIServiceLocator} loaded by this method */
static JVMCICompilerFactory getCompilerFactory() { if (compilerFactory == null) { JVMCICompilerFactory factory = null; String compilerName = Option.Compiler.getString(); if (compilerName != null) { if (compilerName.isEmpty()) { factory = new DummyCompilerFactory(" empty \"\" is specified"); } else if (compilerName.equals("null")) { factory = new DummyCompilerFactory("\"null\" is specified"); } else { for (JVMCICompilerFactory f : getJVMCICompilerFactories()) { if (f.getCompilerName().equals(compilerName)) { factory = f; } } if (factory == null) { throw new JVMCIError("JVMCI compiler '%s' not found", compilerName); } } } else { // Auto select a single available compiler String reason = "default compiler is not found"; for (JVMCICompilerFactory f : getJVMCICompilerFactories()) { if (factory == null) { openJVMCITo(f.getClass().getModule()); factory = f; } else { // Multiple factories seen - cancel auto selection reason = "multiple factories seen: \"" + factory.getCompilerName() + "\" and \"" + f.getCompilerName() + "\""; factory = null; break; } } if (factory == null) { factory = new DummyCompilerFactory(reason); } } factory.onSelection(); compilerFactory = factory; } return compilerFactory; }
Opens all JVMCI packages to otherModule.
/** * Opens all JVMCI packages to {@code otherModule}. */
private static void openJVMCITo(Module otherModule) { if (!IS_IN_NATIVE_IMAGE) { Module jvmci = HotSpotJVMCICompilerConfig.class.getModule(); if (jvmci != otherModule) { Set<String> packages = jvmci.getPackages(); for (String pkg : packages) { boolean opened = jvmci.isOpen(pkg, otherModule); if (!opened) { jvmci.addOpens(pkg, otherModule); } } } } } private static List<JVMCICompilerFactory> getJVMCICompilerFactories() { return JVMCIServiceLocator.getProviders(JVMCICompilerFactory.class); } }